Thermally-responsive poly(ester urethane)s

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  • March 21, 2019
Creator
  • Pierce, Benjamin Franklin
    • Affiliation: College of Arts and Sciences, Department of Chemistry
Abstract
  • Thermally-responsive materials are quite useful in the biomedical field, but their full potential has yet to be realized. For example, polyurethanes are capable of exhibiting shapememory properties, or the ability to change shape upon the application of a stimulus, but only a few practical thermally responsive polyurethanes have been reported due to the lack of novel starting materials and optimized systems. This work describes the synthesis of several degradable polymers and the characterization of their thermally responsive behavior. First, several amorphous polyester prepolymers are synthesized and incorporated in thermoplastic poly(ester urethane)s, which are highly elastic but display impractical thermal properties. Their potential as degradable implants is investigated, as well as their bulk and surface properties. These systems are then optimized and tailored for more practical purposes, resulting in the synthesis of thermoset elastomers based on poly(1,4-cyclohexanedimethanol 1,4-cyclohexanedicarboxylate) (PCCD) prepolymers that display a broad range of useful mechanical properties, thermal properties, and shape-memory properties. A novel method for controlling a microscopic and nanoscopic topographical shape-memory phenomenon is presented. Finally, the synthesis of amine-functionalized polyesters is presented. All materials are characterized by 1H and 13C NMR, GPC, DSC, TGA, and Instron.
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  • In Copyright
Advisor
  • Ashby, Valerie
Degree granting institution
  • University of North Carolina at Chapel Hill
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  • Open access
Date uploaded
  • October 11, 2010

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